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• Building ffmpeg on Windows

  27 février 2014, par Niranjan

  I've the source code of ffmpeg and would like to build it in my win7. I've minGW installed on my machine. I found a step by step instruction from this link :

  http://www.gooli.org/blog/building-ffmpeg-for-windows-with-msys-and-mingw/

  The link 'Download updated bash for MSYS' did not follow. It showed the file is not found. When I try to build the program the way explained in the site, it shows an error :

  Unknown option “–extra-cflags=-mno-cygwin”.
  See ./configure –help for available options.
  ./myconfig : –extra-ldflags=-Wl,–add-stdcall-alias : command not found
  ./myconfig : –target-os=mingw32 : command not found

  From a similar question posted here, I followed the link http://ffmpeg.arrozcru.org/ but the static build downloaded from the site was corrupted. Pls help.

• Build error while compiling ffmpeg on cygwin with libx264

  24 janvier 2011, par Rakesh Singh

  configured ffmpeg(0.6.1) with below command (with x264-snapshot-20101228-2245 snapshot)
  with Gcc version : gcc (GCC) 4.3.4 20090804 (release)

  ./configure --enable-shared --disable-static --enable-pthreads --enable-libx264 
  
  --enable-gpl --disable-doc --enable-memalign-hack 
  
  --extra-ldflags="-L/usr/local/lib"

  and after that, "make" command is giving below error.

  CC      libavdevice/alldevices.o
  
  CC      libavdevice/avdevice.o
  
  CC      libavdevice/oss_audio.o
  
  CC      libavdevice/vfwcap.o
  
  CC      libavformat/4xm.o
  
  In file included from /usr/include/endian.h:42,
  
                   from /usr/include/cygwin/types.h:22,
  
                   from /usr/include/sys/types.h:440,
  
                   from /usr/include/stdio.h:46,
  
                   from ./libavutil/common.h:34,
  
                   from ./libavutil/intreadwrite.h:25,
  
                   from libavformat/4xm.c:30:
  
  /usr/include/byteswap.h:19: error: redefinition of `bswap_16'
  
  ./libavutil/x86/bswap.h:33: error: previous definition of `bswap_16' was here
  
  /usr/include/byteswap.h:25: error: redefinition of `bswap_32'
  
  ./libavutil/x86/bswap.h:40: error: previous definition of `bswap_32' was here
  
  /usr/include/byteswap.h:31: error: redefinition of `bswap_64'
  
  ./libavutil/bswap.h:70: error: previous definition of `bswap_64' was here
  
  make: *** [libavformat/4xm.o] Error 1
  
  bash: sudo: command not found

  I checked lot of links showing same error but no solution has been provided. Anybody has any clue who already build ffmpeg on cygwin ?

• compile FFmpeg error on windows when run ./configure

  5 novembre 2013, par user1325717

  I want to use FFmpeg to decode mp3 and acc on android, I use android-ndk-r7 and the newest cygwin.

  I wrote a shell config.sh, which content is :

  ---

  TMPDIR=/cygdrive/c/temp
  
  
  
  PREBUILT=/cygdrive/c/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows
  
  PLATFORM=/cygdrive/c/android-ndk-r7/platforms/android-8/arch-arm
  
  
  
  ./configure --target-os=linux --arch=arm --enable-version3 --enable-gpl --enable-nonfree --disable-stripping --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-ffprobe --disable-encoders --disable-muxers --disable-devices --disable-protocols --enable-protocol=file --enable-avfilter --disable-network --disable-mpegaudio-hp --disable-avdevice --enable-cross-compile --cc=$PREBUILT/bin/arm-linux-androideabi-gcc --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- --nm=$PREBUILT/bin/arm-linux-androideabi-nm --extra-cflags="-fPIC -DANDROID" --disable-asm --enable-neon --enable-armv5te --extra-ldflags="-Wl,-T,$PREBUILT/arm-eabi/lib/ldscripts/armelf_linux_eabi.x -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtbegin.o $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtend.o -lc -lm -ldl"

  ---

  I open cmd and do bash to open cygwin shell, then do ./config, the problem is appeared :
  "/cygdrive/c/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-gcc is unable to create an executable file..."

  the config.log is :

  check_ld
  
  check_cc
  
  BEGIN /cygdrive/c/temp/ffconf.SFJc3t92.c
  
      1   int main(void){ return 0; }
  
  END /cygdrive/c/temp/ffconf.SFJc3t92.c
  
  gcc -fPIC -DANDROID -std=c99 -c -o /cygdrive/c/temp/ffconf.YKRv5TSp.o /cygdrive/c/temp/ffconf.SFJc3t92.c
  
  /cygdrive/c/temp/ffconf.SFJc3t92.c:1:0: warning: -fPIC ignored for target (all code is position independent)
  
  gcc -Wl,-rpath-link=/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib -L/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib -nostdlib /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtend_android.o -lc -lm -ldl -o /cygdrive/c/temp/ffconf.Yf1Ftjmo /cygdrive/c/temp/ffconf.YKRv5TSp.o
  
  /usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../i686-pc-cygwin/bin/ld: /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o: Relocations in generic ELF (EM: 40)
  
  /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o: could not read symbols: File in wrong format
  
  collect2: ld returned 1 exit status
  
  C compiler test failed.

  I don't know what is happened, is there someone who know what is happened, thanks.